新型特种复相铜合金的协调变形机制研究

项目名称： 新型特种复相铜合金的协调变形机制研究

项目编号： No.51301016

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 一般工业技术

项目作者： 郭明星

作者单位： 北京科技大学

项目金额： 25万元

中文摘要： 由于陶瓷粒子弥散强化铜合金协调变形性能差，加工难度大再加上生产工艺复杂使的该类合金生产成本一直居高不下，严重限制了其应用范围。针对弥散强化铜合金协调变形性能差的这一瓶颈问题，本项目设计并制备了由FeC相构成的新型复相铜合金。充分利用FeC相马氏体和奥氏体之间的相变，使复相合金兼具有高强度和高协调变形能力等特性。本项目拟采用纳米显微力学探针、HRTEM、XRD、3DAP显微组织精细表征、SEM/TEM动态拉伸原位观察和数值模拟等方法，对合金显微组织重复性控制，FeC相结构和相变规律，组织性能间的定量关系，合金协调变形行为、强化及其理论模型创建、优化和应用等展开研究。通过研究掌握并提出合金复相组织搭配原则、协调变形机制及微机械复合材料预测模型等。本研究不仅对新型复相铜合金的进一步开发、加工和应用具有重要指导作用，而且对于更好地研究其它复相合金协调变形机制等共性关键科学问题也具有重要的科学意义。

中文关键词： 复相铜合金；加工；热处理；协调变形机理；理论模型

英文摘要： Due to the poor coordinated deformation ability, difficult-to-machine and complex production process, the production cost of dispersion strengthened copper alloys is always too high, seriously restricting its wide application. In view of the bottleneck problem-poor coordinated deformation ability existing in dispersion strengthened copper alloys, the advanced multi-phase copper alloys with FeC phase were designed and prepared in this project. Making full use of the phase transformation of FeC phase, the multi-phase copper alloys can combine high strength and high coordinated deformation ability. The following researches, the control of microstructure repeatability, the structure and phase transformation of FeC phase, the relationship between microstructure and properties, coordinated deformation behaviors and strengthening, establishing and optimizing the predicting model for coordinated deformation behaviors, and the corresponding application for the predicting model, will be conducted by nano indenter, HRTEM, XRD, 3DAP, dynamic tension in-situ observed by SEM/TEM, and numerical modelling. At last, on the basis of obtained results, we can put forward the principle of multi-phase microstructure design, coordinated deformation mechanism, strenghtening mechanism, electric conduction mode, micromechanical composite

英文关键词： Multi-phase copper alloys；Processing；Heat treatment；Coordination deformation mechanism；Theoretical modelling